Author: Fredy Purnomo, Billy Sarikho Agus Sutanto,Yossy; | Publisher: Prosiding nasional aplikasi teknologi informasi 2010 Yogyakarta 19 Juni 2010 (SNATI)
Author: Ms.Orathai Srithongtham; Mrs. Manassanun Limpavithayakul,et al.; | Publisher: 2011 international conference on social science and humanity february 26-28, 2011 singapore volume 1 proceedings (ICSSH)